package test.eight;

class Useful {
	public void f() {
	}

	public void g() {
	}
}

class MoreUseful extends Useful {
	public void f() {
	}

	public void g() {
	}

	public void u() {
	}

	public void v() {
	}

	public void w() {
	}
}

public class RTTI {
	public static void main(String[] args) {
		Useful[] x={
				new Useful(),
				new MoreUseful()
		};
		x[0].f();
		x[1].g();
//		x[1].u();
		((MoreUseful)x[1]).u();
		((MoreUseful)x[0]).u();
	}
}
